fast twitch

any of you guys use this stuff? i see alot of n o explode and amped in threads, but i havent seen anyone really talk about this that i know of.. i train with the owner of the gym on chest days and shoulder days and he got me hooked on this shit.. its like a shot of caffine, creatine..seems ive gotten much better workouts while on this than xplode.. anyone used this before?